<template>
    <div>
        <h3 class="nihao">发表评论</h3>
        <hr>
        <textarea placeholder="请输入要BB的内容(最多吐槽120字)" maxlength="120" v-model="msgg"></textarea>
        <mt-button type="primary" size="large" @click="postcomments()">发表评论</mt-button>
        <div class="cmt-list" v-for="(itme,i) in comments" :key="itme.add_time">
            <div class="cmt-itme">
                <div class="cmt-title"> 
                    第{{ i+1 }}楼&nbsp;&nbsp;用户:匿名用户&nbsp;&nbsp;发表时间:{{itme.add_time |dataFormat}}
                </div>
                 <div class="cmt-body">
                     {{itme.content ==="undefined" ? "此用户很懒，啥也没说":itme.content}}
                 </div>
            </div>
        </div>
        <mt-button type="danger" size="large" plain @click="getMore()">加载更多</mt-button>
    </div>
</template>

<script>
import { Toast } from 'mint-ui'
export default {
    data(){
        return{
            pageIndex:1,
            comments:[],
            msgg:''
        }
    },
    created(){
        this.getComments();
    },
    methods:{
        getComments(){//获取评论
            this.$http.get("api/getcomments/"+this.id+"?pageindex="+this.pageIndex).then(result=>{
                if(result.body.status===0){
                    // this.comments=result.body.message;
                    //每当获取新评论数据的时候，不要把老数据清空覆盖，而是应该以老数据，拼接上新数据
                    this.comments=this.comments.concat(result.body.message)
                }else{
                    Toast("获取评论失败")
                }
            })
        },
        getMore(){//加载更多
        this.pageIndex++;
        this.getComments();
        },
        postcomments(){
            if(this.msgg.trim()===0){
                return Toast("评论内容不能为空")
            }
            this.$http.post("api/postcomment/"+this.$route.params.id,{
                content:this.msgg.trim()
                })
                .then(function(result){
                        if(result.body.status===0){
                            var cmt={
                                user_name:'匿名用户',
                                add_time:Date.now(),
                                content:this.msgg.trim()
                            };
                            this.comments.unshift(cmt);
                            this.msgg=null
                        }
                })
        }
    },
    props:["id"]
}
</script>

<style>
.nihao{
    font-size: 18px;
}
textarea{
    font-size: 14px;
    height: 85px;
    margin: 0px;
}
.cmt-itme{
    font-size: 14px;
}
.cmt-title{
    line-height: 30px;
    background-color: #ccc;
}
.cmt-body{
    line-height: 35px;
    text-indent: 2em;
}
.cmt-list{
    margin: 5px 0;
}
</style>
